NEW YORK (CBSNewYork/AP) — U.S. Sen. Charles Schumer (D-N.Y.) warned Sunday that poorly made cellphone batteries can lead to phones overheating and exploding.

Schumer commented Sunday at a stop in Manhattan. He said problems most often occur when people replace batteries that came with their phones with bargain-priced batteries that might be counterfeit.

Schumer said there have been at least 60 reported instances of cellphone batteries smoking, catching fire or exploding in the last two years. He called on the Consumer Product Safety Commission to determine the full scope of the problem.

“Bottom line, people should not feel like this is a ticking time bomb in their pocket,” Schumer said.

Consumer advocates also called for better safety standards.

“We need to do a better job making sure that everything that is sold online or in a discount store or retail store meets those standards,” said Chuck Bell of the Consumer Union.

Schumer noted publicized cases of a Minnesota eighth grader who was burned when a cellphone exploded in his pocket. He says a Texas man injured his ear in a similar incident.